Absolutely hate R-Pro. I can't put my finger on it exactly but it feels and flies like garbage to me. I really hated when they started running DX that felt like mostly R-Pro.
I had a disc I found that was a DGA Proline something. It felt closer to the esp flx but still closer to Pro from Innova. ESP FLX just feels right to me usually. I don't even throw any discraft now except a 10 year buzzz but I still enjoy feeling them in the cold.